JP2756412B2 - Pickup unit support structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pickup unit supporting structure. More specifically, the present invention relates to a pickup unit support structure that moves without interfering with the movement trajectory of the tray when moving from the retracted position when the tray is moved to the position where the disc is held and played.

[0002]

2. Description of the Related Art A pickup unit in a disc reproducing apparatus is lowered when playing a disc in and out of the disc in order to avoid collision when the tray for carrying the disc is moved back and forth between an eject position and a playing position. It is common to move to a position and then raise it.

[0003] For example, the same applies to a disc changer that includes a stocker containing a plurality of carriages for loading a disc inside a disc reproducing apparatus, and exchanges discs using a tray for inserting and removing an arbitrary carriage from the stocker. Kaihei 4-38657).

In this disc changer, as shown in FIG. 28, a carriage 202 containing a disc 203 to be played by moving a stocker 201 for accommodating a plurality of carriages 202, 202 is moved in and out of a tray 204. Move the stocker 20
The disc 203 in the carriage 1 is moved to the tray of the carriage 202, and the disc is taken out to a position where the disc can be played or an eject position outside the disc reproducing apparatus by moving the tray back and forth. In the playing position, the pickup 205 moves up and down to move the carriage 20.
2 to clamp the disk 203 on the carriage 202
Lift and rotate. In this case, the vertical movement of the stocker 201, the taking in / out of the tray 204, and the pickup 20
5 is different from the motors 206, 207, and 20 respectively.
8.

[0005]

However, since a unique motor 207 for moving the pickup unit 205 up and down is required, there are problems that the number of parts is increased and the size of the disk reproducing apparatus is increased as a whole. ing. In addition, since the pickup unit 205 is moved up and down while being kept in a horizontal state, it is bulky in the up and down direction to secure a sufficient amount of elevating and lowering, and the size of the disc reproducing apparatus becomes large as a whole.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pickup unit supporting structure which can be arranged by swinging with a simple mechanism so as not to interfere with a tray.

[0007]

In order to achieve the above object, the present invention provides a pickup unit having a turntable on which a disc is placed and rotated, and a pickup for reading information on the disc; In a pickup unit supporting structure comprising a movable member and a supporting member, the pickup unit is provided with a turntable at one end remote from the turntable.
Two supporting shafts arranged vertically apart from each other in the axial direction of the cable, and the supporting member has a vertically long hole in which the upper supporting shaft is fitted and an inclined long hole in which the lower supporting shaft is fitted. Are formed so that the pickup unit performs a substantially horizontal ascending operation near the ascending position.

[0008]

Therefore, when the free end of the pickup unit is lowered, the pickup is supported by the two support shafts from the rear end of the pickup unit, that is, from the turntable.
Even at one end side which is farther away , both are located at the bottom portions of the two long holes, so that the height is low. Therefore, the tray is sunk at an angle lower than the movement locus of the tray. Here, as the free end side is lifted, one of the two support shafts moves through the oblique long hole. Therefore, the support shaft that moves in the vertical long hole is pulled down to raise the entire pickup unit in the free end side lifting direction. The pickup unit is swung while moving in the horizontal direction by moving the pickup unit in the same direction as above, and the inclination is set to be horizontal.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of the present invention will be described below in detail with reference to the embodiments shown in the drawings. This embodiment shows a case where the present invention is applied to a disk changer having a stocker for storing a plurality of disks in advance.

The disc changer has a playing position between a stock position and an eject position of the disc. A plurality of discs 3 are placed on a tray-shaped carriage 2 and stacked, and are moved up and down to move any disc. 3 for transporting the selected disc 3 to the playing position or the eject position with the selected disc 3 mounted on the carriage 2; and for moving the stocker unit 1 and the transporting unit 4. Motor 5 as a first driving means for the disk 3 and the disk 3
, A cam member 7 for moving the unit 6 up and down, a motor 8 serving as second driving means for rotating the cam member 7, and a cam member 7 driven by the cam member 7. A switching mechanism 9 for transmitting the power of the first motor 5 by switching between the stocker unit 1 and the transport unit 4
It is composed of

The transport means 4 for taking in and out the disk 3 and the carriage 2 includes a tray 10 for moving an empty carriage 2 on which the disk 3 is mounted or not mounted between a tray storage position and an eject position; A shuttle 1 for storing the carriage 2 from the tray 10 through the playing position to the stocker unit 1 or pulling out the carriage 2 from the stocker unit 1 and setting the carriage 2 in the tray 10.
1 and a drive mechanism 12 for driving the tray 10 and the shuttle 11 in the disk loading / unloading direction.

Here, the drive mechanism 12 includes, as shown in FIGS. 7 and 8, a motor 5 as first drive means,
A pulley 13, a belt 14, a pulley 15 having a larger diameter than the pulley 13 of the motor 5, and a gear (not shown) provided coaxially with the pulley 15 for driving a tray. It is composed of a gear 16, a switching gear 17, and a shuttle driving gear 18 that meshes with the tray driving gear 16 via the switching gear 17. These gears, motors, and the like are provided in the main chassis 1 of the disc reproducing apparatus.
9 is rotatably supported by a right side chassis 20 fixed on the upper surface 9. When the shuttle 11 enters the right side chassis 20, the trigger switch 22 is pushed up when the shuttle 11 enters, and starts the detection of the reflection type photo sensor 21 for detecting the disk on the carriage 2. Projection 24 of carriage lifter 23 that lifts the carriage above the carriage that was
And a carriage arm 25 for advancing the carriage lifter 23 and lowering the lifted carriage.
And a limit switch 26 that detects that the shuttle 11 has been retracted to a predetermined position and detects that the carriage 2 has been stored in the stocker 52. still,
The right side chassis 20 and the left side chassis 27 include:
A guide protrusion 28 that functions as a rail when the tray 10 moves back and forth, and a vertical guide that engages with the upper pin 64u of the pins 64u and 64d that are provided by two on each side of the stocker 52. A groove 29 is provided.

As shown in FIGS. 20 and 21, the tray 10 includes a tray body 30 and a frame 31 for reinforcement.
32, and plates 33 and 34 which form guide grooves (not shown) for holding the carriage 2 and the shuttle 11 between the tray main body 30. Each plate 3
Reference numerals 3 and 34 denote rails 35 made of thin ridges which engage with grooves (not shown) formed on the back side of the carriage 2.
Are formed. A lock arm 37 is provided on the plate 34 side for inserting the shuttle 11 so as to engage with the concave portion 36 at the tip of the shuttle 11 and fix the shuttle 11 to the tray 10. The lock arm 37 is composed of an L-shaped arm, and a spring 38 constantly controls the shuttle 1.
It is urged in a direction to engage with one recess 36. The distal end of the shuttle 11 is provided with a wedge-shaped projection 39 for temporarily rotating the lock arm 37 against the spring force and overcoming it. The opposite end 40 of the lock arm 37 projects to the back side of the tray 10, and when the tray 10 is accommodated in the playback device, it comes into contact with a projection 41 provided at the front end of the right side chassis 20, and Tray 10
It is provided to release the lock with. Also,
On the back side of the shuttle 11, a rack 146 is formed. Further, on the back side of the tray body 30, there are provided vertical grooves (not shown) which respectively engage with guide protrusions 28, 28 provided near the entrances of the left and right side chassis 20, 27. I have. The arm portion 43 and the plate 3 is inserted into the tray holding groove <br/> unit content of 42 of the right side chassis 20
4 is provided with a tray driving gear 16 which constitutes a conveying means.
And a rack 144 that meshes with the rack. Accordingly, the arm portion 43 of the tray 10 is held by the tray holding groove portion 42 in a state where the guide protrusions 28, 28 and the grooves of the tray main body 30 are engaged, and is supported movably in the front-rear direction. The tray 10 moves back and forth by the engagement of the tray driving gear 16 and the rack 144.

Here, the rack of the tray 10 is
Is formed to have such a length that the meshing with the tray driving gear 16 is released when it is pulled into a predetermined position. Therefore, when the tray 10 is pulled into the predetermined position, the tray 10 does not mesh with the tray driving gear 16 unless pushed out by the shuttle 11. It should be noted that the tray 10 is designed so that the rack 144 on the rear surface and the gear 16 for driving the tray are disengaged from each other.
Shuttle 1
1 is stopped by being separated from the tray 10. Further, when the shuttle 11 enters the tray 10 and is fixed, it enters the end of the tray 10 where the shuttle 11 enters and exits, and when the shuttle 11 jumps out of the tray 10 and is fed out to the tray holding groove portion 42. Is provided with a latch lever 44 which is fitted to a concave portion (not shown) of the right side chassis 20 to fix the tray 10 to the right side chassis 20 so as not to move. The latch lever 44 is swingably installed in the tray 10 and protrudes from the hole 45 of the tray 10 when the user rides on the shuttle 11.
When housed in the space 0, it falls from the shuttle 11 and immerses.

Further, the edge of the substantially circular hole 46 for accommodating the discs on the tray 10 is provided on the edge of the upper disc which slips down when the two discs are erroneously placed on the carriage 2 and stored in the stocker. Claws 47, 47 supporting the ends
Is provided. The claws 47 are exposed when the carriage 2 on which two discs are loaded is pulled out of the tray 10 and stored in the stocker 52, and is exposed to the holes 4 of the tray 10.
The end of the disk 3 remaining on 6 is supported together with the disk 3 stored in the stocker 52. On the edge of the circular hole 46 of the tray body 30 on the exit side, a projection 48 is provided which engages with a vertical groove 49 provided in the carriage 2. A gap is provided between the protrusion 48 and the concave portion 50 of the carriage 2 for accommodating a disk, such that only one disk 3 can pass therethrough. If two or more disks are placed on the carriage 2, one Except for the bottom disk, the upper disk is prevented from passing therethrough and is left on the tray 10. Therefore, even if two or more disks are placed on the carriage 2, only one disk is placed on the carriage 2 and stored in the stocker 52,
The disk 3 exceeding the capacity is not stored.
When it is confirmed that the carriage 2 has been accommodated in the stocker 52 by the operation of the limit switch 26 pressed at the end of the stroke of the shuttle 11, a signal notifying the presence of the disc at the playing position is still output by the photo sensor 2.
1, the automatic disc ejecting mechanism for judging that a plurality of discs are loaded, reversing the motor 5, pulling out the carriage 2 from the stocker 52 again, and pushing the tray 10 to the eject position. Is configured. Here, since the second and subsequent disks are supported by the claws 47 and 47 of the tray main body 30 and the edges of the disks stored in the stocker 52, they do not fall below the tray 10, and When the disk is taken out by pulling out the carriage 2, the disk is again placed so as to overlap the disk and is taken out.

The stocker unit 1 includes a plurality of plate-shaped carriages 2 on which the discs 3 are placed (for example, seven in this embodiment).
A stocker 52 stored in a stacked state, and a stocker elevating mechanism 53 for moving the stocker 52 up and down,
An arbitrary carriage 2 selected by moving the stocker 52 up and down is moved to a position where the carriage 2 can be taken in and out of the tray 10. Here, the stocker raising mechanism 53 is, as shown in FIG.
Left and right stocker support plates 6 for supporting the stocker 52 movably in the vertical direction between the right and left guide grooves 29
The gear train includes 9R and 69L, a gear train including a stocker gear 71 that moves the gears 9R and 69L forward and backward, and a bush 78, a gear 77, a shaft 79, and the like connected to the motor 5 as the first driving means.

Here, the stocker 52 is provided with a leaf spring 54 on the side of the depth side for engaging with a concave portion 58 on the side of the carriage 2 to urge and fix it with a light force, and has the carriage 2 on the abutting surface. A hole (not shown) into which the projection 55 at the rear end is fitted is provided. Therefore, the carriage 2
Are supported swingably in the vertical direction in the stocker 52 around the projection 55 at the rear end, and are stacked at the edge of the front end. The stocker 52 houses seven carriages 2. The lowermost carriage 2 has a concave portion 51 for accommodating an 8 cm disk in addition to a concave portion 50 for accommodating a 12 cm disk. Other carriages are not provided with a recess 51 for accommodating an 8 cm disk to save space. The carriage 2 has recesses 50 and 51 on which the disc 3 is placed, and a through hole 56 at the center thereof so that the turntable 110 of the pickup unit 6 can pass therethrough. The arms 6 of the shuttle 11 are provided on both sides of the front end of the carriage 2.
A concave portion 57 that engages with zero is provided. This recess 57
Is provided at least on the side surface where the shuttle 11 enters and exits. A carriage stopper pin 62 hanging from a top cover 61 is inserted into the recess 57 to prevent the carriage 2 from falling off the stocker 52.
A gap is provided between the carriage stopper pin 62 and a protrusion (not shown) that is also protruded upward from the 0 and 27 sides and through which only one carriage 2 that is put in and out by the shuttle 11 can pass. ing. Therefore, except for one of the seven carriages 2 accommodated in the stocker 52, one of which is taken in and out by the shuttle 11, the other six carriages are provided with the carriage stopper pins 62 and the projections (not shown) of the side chassis 20, 27. The recesses 57 do not jump out due to the engagement.

Further, wedge-shaped projections 59 are formed on both sides of the carriage 2. The wedge-shaped projection 59 is used to lift the carriage 2. That is, wedge-shaped projections 5 of the carriages 2, 2,..., 2 in which wedge-shaped projections 85 provided on carriage lifters 23, 84 attached to the left and right side chassis 20, 27 so as to be able to move back and forth are stacked.
By interleaving between 9,..., 59, the carriage above the carriage on which the disk to be pulled out is placed is pushed up, so that a space can be formed between the carriage and the carriage to be pulled out. The wedge-shaped projection 59 of the carriage 2 and the wedge-shaped projection 85 of the carriage lifter 84
Thus, a lift mechanism which operates in conjunction with the movement of the switching mechanism 9 and lifts up a carriage above the carriage on which the selected disk is loaded in the stocker 52 is configured. A photo sensor 2 for detecting the presence of the disk 3 is provided at a position substantially corresponding to the center in the front-rear direction of the concave portion 50 for accommodating the disk 3 of the carriage 2.
A slit-shaped hole 67 through which the light from 1 passes is provided.

On the other hand, the bottom plate of the stocker 52 has a circular hole 6 concentrically with the center hole 3h of the disk 3 on the carriage 2.
5 is opened, and a cylindrical disk lock pin 125 slidably supported by a shaft 130 protruding from the main chassis 19 is provided so as to be inserted therein. A top cover 61 is provided on the upper plate of the stocker 52.
A circular hole 66 into which a disc stopper pin 63 hanging from the hole is inserted is formed. The disc lock pin 125 protruding from the main chassis 19 and the disc stopper pin 63 hanging down from the top cover 61 are opposed to each other. In a mode in which the carriage 2 and the disc 3 can be taken in and out, one carriage 2 and the disc 2 are interposed therebetween. It is provided so that there is a gap enough to allow only the disc 3 mounted thereon to pass through. In a mode in which it is necessary to prevent the carriage 2 and the disk 3 from jumping out, for example, when the stocker 52 is moved up and down to move the carriage 2 on which the selected disk is mounted to the take-out position and the front-back movement height of the tray. The disc lock pin 125 is pushed upward to abut against the disc stopper pin 63 to close the above-mentioned gap so that the disc 3 on the carriage 2 does not come out of the stocker 52. The disc stopper pin 63 and the disc lock pin 125 pass through the center hole 3h of the disc 3, respectively.

The disk lock pin 125 is a spring 1
41, the upward movement is suppressed by the lock pin cam 128, and the lock pin cam 1
The vertical movement is controlled by 28. The lock pin cam 128 is a swash plate-like cam that engages with pins 127, 127 protruding laterally from the lower end of the disk lock pin 125 and suppresses the rise of the disk lock pin 125.
It is supported so as to be able to move back and forth by a long hole 129 that is fitted into the hole. Further, a pin 142 provided at one end of the lock pin cam 128 engages with a disk lock pin driving cam groove 101 provided on the back surface side of the cam member 7, and the rotation of the cam member 7 causes the lock pin cam 128 to rotate. It is provided so as to slide in the front-back direction. Accordingly, when the lock pin cam 128 moves in the front-rear direction due to the rotation of the cam member 7, the disc lock pin 12
5 rises or falls.

A sensor 126 for confirming the rise of the disc lock pin 125 is arranged near the lower end of the disc lock pin 125. Then, using this sensor 126, the cam member 7
When it is detected that the disk lock pin 125 cannot be lifted in spite of the rotation of the disk lock pin 125 to the position for raising the disk 25, the 8cm disk is accommodated in spite of the defective position of the disk or the carriage dedicated to the 12cm disk. An 8 cm disk erroneous insertion detection mechanism is configured to judge that the disk has been inserted and remove it. That is, as shown in FIG. 18A, when the disc is normally mounted, the center hole 3h of the disc 3 is inserted into the disc lock pin 125.
Penetrates and comes into contact with the disk stopper pin 63. However, when the disk 3 is displaced as shown in FIG. 19A, the disk lock pin 125 comes into contact with the disk lock pin 125 as shown in FIG. The disk 3 is sandwiched between the disk stopper pin 63 and the disk lock pin 125 is not completely lifted. Therefore, the disk lock pin 125
Is not output from the sensor 126. Also, 8cm on the carriage for 12cm disc
8 cm on the carriage even when the disc is loaded
The disc moves and the 8cm disc center hole 3
h is shifted from the disk lock pin 125, and the same is true.

The cam member 7 is attached to a shaft 131 installed on the main chassis 19 and is rotated forward and reverse by a motor 8 as a second driving means. The rotation of the motor 8 is performed by the shaft 1 on the main chassis 19 via the worm 97.
32 is transmitted to a gear 98 supported by the
Is transmitted to the gear 99 on the outer peripheral surface of the cam member 7 that meshes with the gear. As shown in FIG. 5, two groove cams, a cam groove 100 for controlling the vertical movement of the stocker 52 and a cam groove 101 for controlling the vertical movement of the disc lock pin 125, are formed on the back surface of the cam member 7. ing. A pin 138 of a change arm 88 interlocking with a change plate 87 constituting the switching mechanism 9 is fitted in the outer cam groove 100, and the other end of the change arm 88 is engaged with a change arm via a spring 145. The plate 87 is provided so as to slide left and right in FIG. On the other hand, the inner cam groove 10
1 is fitted with a pin 142 of the lock pin cam 128. A change arm 8 is provided on the small diameter side a of the outer cam groove 100.
8 when the pin 138 is positioned, the change plate 8
Reference numeral 7 is slid rightward, and the motor 5 is connected to a drive system for moving the stocker 52 up and down. Therefore, the stocker 52 moves up and down by driving the motor 5. At this time, since the pin 142 of the lock pin cam 128 is located on the large-diameter side c of the inner cam groove 101, the disk lock pin 125 is spring-biased upward and comes into contact with the disk stopper pin 63 of the top cover 61. The carriage and the disk 3 do not come out of contact with each other.
When the pin 138 of the change arm 88 is positioned on the large diameter side b of the outer cam groove 100, the change plate 87 is slid to the left, and the drive system for moving the stocker 52 up and down is separated from the motor 5. A drive system for moving the shuttle 11 and the tray 10 back and forth is connected to the motor 5. At this time, the inner cam groove 101
Since the pin 142 of the lock pin cam 127 is located on the small diameter side d , the disc lock pin 125 is pushed down against the spring force, and a gap is formed between the disc lock pin 125 and the disc stopper pin 63 of the top cover 61. The carriage 2 and the disk 3 can enter and exit.

Further, the cam member 7 is provided on the front side of the cam member 7.
Cams 103a, 103b for detecting the rotational position of
103c is provided. These three cams 103a,
The position sensors 133 and 134 arranged on the main chassis 19 are operated by 103 b and 103 c to detect the rotational position of the cam member 7.

Further, a cam 102 for moving the pickup unit 6 up and down is formed on the surface of the cam member 7.
As shown in FIGS. 10 and 11, this cam 102 has a grooved cam for holding the free end 115 of the arm 107 formed on the peripheral surface thereof. Is moved to the retreat position (FIG. 10A) from the performance position (FIG. 10C) to the arm 107.

On the other hand, the change arm 88 and the change plate 87 driven by the above-mentioned cam member 7 are engaged with an engagement piece 89 passing through the long hole 147 of the change plate 87.
And the spring 14 interposed between the engagement piece 89 and the engagement piece 90 of the change plate 87.
5, the pin 138 is constantly urged toward the outer diameter side of the cam member 7 by the change arm 88. The change plate 87 has two long holes 93, 93 in the longitudinal direction, and can be moved in a direction crossing the main chassis 19 by two guide pins 136 of the main chassis 19 passing through the long holes 93, 93. It is supported by. Therefore,
When the change arm 88 swings due to the rotation of the cam member 7, the change plate 87 slides left or right.

On the other hand, a carriage lever 86 is connected to the left end of the change plate 87. The carriage lever 86 and the change plate 87 are connected by a long hole 9 inclined at 45 ° with respect to the slide direction of the change plate 87.
4 and a pin 95 fitted thereto, and is provided so as to convert the left and right slide of the change plate 87 into the forward and backward movement of the carriage lever 86. The carriage lever 86 has a long hole 96 extending in the front-rear direction.
The main chassis 19 is mounted on the main chassis 19 so as to be movable in the front-rear direction by two guide pins 135 and 135 of the main chassis 19 that pass through the elongated holes 96. A carriage lifter 8 slidably supported by the left side chassis 27 is provided at the tip of the carriage lever 86.
4 are fitted and provided so as to move it back and forth.

An upright fork 91 is formed near the right end of the change plate 87 so that the right side chassis 2
0 and is engaged only in the axial direction with the left end of the shaft 79. Thereby, the change plate 87
The shaft 79 is also slid left and right in accordance with the slide. On the other hand, a switching gear 17 is provided at one end of the shaft 79, and three lock-up pins 8 are provided at the other end.
A bush 78 having a zero is fixed so as to rotate integrally, and a gear 77 facing the bush 78 is rotatably mounted on a shaft 79 with a spring 82 interposed therebetween. Therefore, the change plate 87
The lock-up pin 80 of the bush 78 and the gear 77
The lock-up pin 81 is engaged or disengaged, and the switching gear 17 is provided so as to be separated or engaged with the shuttle driving gear 18. Thus, in combination with the motor 8 and the cam member 7 serving as the second driving means, a switching mechanism 9 for transmitting the rotation of the motor 5 to the stocker unit 1 or the transporting means 4 by switching is configured.

On the other hand, a gear train composed of gears 76, 75, 74 supported by a gear plate 83 is connected to the gear 77, and is provided to transmit the rotation of the gear 77 to the stocker gear 71. The stocker gear 71 is composed of a rack,
It is fixed to the right stocker support plate 69R by screws or the like. Left and right stocker support plates 69R, 6
9L is slidable in the front-rear direction by being slidably attached to the main chassis 19 using long holes 73, 73 extending in the front-rear direction. The right end of the stocker arm 72 rotatably supported by the shaft 130 rising from the main chassis 19 is engaged with the right stocker support plate 69R, and the left end is engaged with the left stocker support plate 69L. I have. This engagement is performed by, for example, the left and right stocker support plates 69R, 69R.
This is performed by inserting the tip of the stocker arm 72 into a slit opened in L. Therefore,
Shaft 7 linked to slide of change plate 87
9 changes the switching gear 17 to the shuttle driving gear 1.
8, the bush 78 and the gear 77 are connected to transmit the rotation of the motor 5 to the stocker gear 71, and the right stocker support plate 69R slides forward or backward, and at the same time, the left stocker support plate 69R.
L also slides in the opposite direction. Also, stepped grooves 70R, 70L are formed in the stocker support plates 69R, 69L, and the stockers 52 are formed in the grooves 70R, 70L.
One of the two sets of roller pins 64u and 64d protruding laterally, for example, the lower roller pin 64d is engaged. The other of the roller pins 64d, for example, the upper roller pin 64u is provided with a vertical groove 2 provided in the left and right side chassis.
9 and 29, respectively, and are provided so as to be movable only in the vertical direction. Therefore, when the left and right stocker support plates 69R and 69L move forward or backward in the opposite directions, the lower roller pin 64d moves up and down the stepped grooves 70R and 70L, and moves the stocker 52 up and down. Note that a spring 140 is stretched between the stocker arm 72 and the main shutter 19.

The pickup unit 6 for loading and rotating the disk 3 for reproduction is separated from the turntable 110.
Move up and down by bracket 108 at one end
It is supported. This pickup unit 6
It comprises a pickup 106 and an arm 107 that supports the pickup 106 and moves it up and down. The pickup 106 is connected to the arm 10 via the cushion 109 at four places.
7 and is elastically supported. This arm 10
7 at one end away from the turntable 110
Two support shafts 111 and 112 arranged on a line inclined with respect to the surface on which the pickup 106 is placed, that is, on different vertical lines, are formed at positions supported by the bracket 108, and are fixed to the main chassis 19. It is fitted into two long holes 113 and 114 of a bracket 108 as a support member. Two spindles 11 that engage with the bracket 108
A cam member 7 is provided on the free end side of the arm 107 supported on the main chassis 19 so as to be swingable by the
The arm 115 is provided so that a vertical displacement is given to the free end side of the arm 107 by the rotation of the cam member 7. Of the two long holes, the long hole 113 into which the upper support shaft 111 is fitted is long in the vertical direction, and the long hole 114 into which the lower support shaft 112 is fitted is inclined. The two long holes 113 and 114 are not arranged on the same line, and the lower inclined hole 114 is provided slightly rearward, that is, toward the turntable 110 side. Also, the two support shafts 111 and 112 are not arranged on the same line, and the lower support shaft 112 is provided slightly to the rear. For this reason, the center of rotation of the arm 107 is set forward (toward the eject position) by the vertical movement of the upper support shaft 111 and the oblique vertical movement of the lower support shaft 112. Therefore, when the arm 107 rotates up and down around the two support shafts 111 and 112 by the rotation of the cam member 7, the arm 107 moves upward while moving in the horizontal direction near the ascending position. The free end of the arm 107 is provided with a pin 115a projecting upward. The pin 115a engages with the hole 68 of the carriage 2 to finely adjust the positioning of the carriage 2.

The clamper 117 is provided between the turntable 110 of the pickup unit 6 and the disc 3.
A ferromagnetic clamper plate 123 made of, for example, a plastic cylinder and adsorbed by a magnet embedded in the turntable 110 is fixed in the cylinder, and a clamper chassis 116 is provided.
And is rotatably mounted in a square hole 118 formed in the hole. Hole 1 of clamper chassis 116
Slits 119, 119, 119 are provided on at least two sides, preferably three sides, around 18, and the surrounding sides 124, 124, 124 are provided so as to function as springs. In addition, a hole 118 is formed in the clamper 117.
Flanges 121 and 122 having a diameter larger than that of the clamper chassis 11 are provided.
6 is provided so as not to be disengaged by being engaged. The size of the cylindrical portion is smaller than one side of the hole 118, and when the cylindrical portion is pressed against a part of the hole 118, the flange portion slightly engages with the other two sides. The dimensions are. Therefore, when inserting the clamper 117 into the square hole 118 of the clamper chassis 116, first insert a part of the flange 121 using the diagonal line of the hole 118, and then press the cylindrical portion against one corner 120 thereof in the axial direction. By pressing to 2
The sides 124 and 124 and the pressed side 124 are elastically deformed to allow the flange 121 to get over. At this time, if the outer surface of the flange 121 is a slope or a curved surface, it is possible to more easily get over the flange 121. Once the flange 121 passes through the hole 118 and is fitted, the flange 121 does not easily come off because it is caught by the edge of the hole 118. The diagonal line of the square hole 118 is slightly longer than the diameter of the flange 121 of the clamper 117 , and the middle side is bent.

According to the disk changer configured as described above, the operation is as follows.

First, the exclusion of a disk will be described. In the state where the tray 10 and the carriage 2 are stored, the first
When the motor 5 as a driving means of the motor starts rotating according to a command from a control device (not shown), the power of the motor 5
4, to the pulley gear 15, the tray driving gear 16, the switching gear 17, the shuttle driving gear 18, and the shuttle 11. At this time, since the arm 60 of the shuttle 11 is engaged with one of the recesses 57 of the carriage 2 in the stocker 52, the shuttle 11 is pulled out toward the tray 10. In this mode, the cam member 7 is rotated by the motor 8 as the second driving means, and the change plate 87 is moved to the left, so that the carriage lever 86 is also moved backward,
The wedge-shaped projection 85 of the carriage lifter 84 lifts the carriage above the carriage that is interrupted and transferred between the carriage to be transferred and the wedge-shaped projection 59 of the carriage above. At this time, the change plate 87
Of the stocker gear 71 is fitted into the groove 104 provided on the lower surface of the stocker gear 71, so that the left and right stocker support plates 69R and 69L are locked in forward and backward motion, and
2 is fixed so as not to move up and down. At the same time, the bush 78 and the gear 77 constituting the switching mechanism 9 are not engaged, and the switching gear 17 coaxial with the bush 78 meshes with the shuttle driving gear 18.

When the shuttle 11 moves forward, the carriage arm 25 rotatably provided on the side chassis 20 rotates clockwise by the force of the spring 143, so that the carriage lifter 23 also moves rearward.
A wedge-shaped projection (not shown; the same shape as the carriage lifter 23 on the opposite side) cuts below the wedge-shaped projection 59 of the carriage to lift the carriage above the carriage being transferred. Further, when the shuttle 11 is extended and pushes the tray 10 forward, at the same time, the racks 14 formed on the lower surfaces of the tray and the plate 34 respectively are formed.
4 and the tray driving gear 16 mesh with each other, and the tray 10 starts to move forward by the tray driving gear 16.

At the moment when the tray 10 starts to move forward, the lock arm 37 provided in the tray 10 rotates and engages with the concave portion 36 of the shuttle 11, so that the tray main body 30 and the shuttle 11 are integrated. Therefore, shuttle 11
The carriage 2 engaged with the arm 60 is also integrated. The loading operation of the disk 3 is the reverse of the operation of discharging the disk carriage. Further, the switch 126 operates only when the disk lock pin 125 is completely raised, so that even when the disk is an 8 cm disk or is loaded off-center, it can be detected and automatically ejected. It has become.

Next, the vertical movement of the stocker unit 1 will be described. First, the vertical movement of the stocker 52 is performed only when the tray 10 is stored in the disc reproducing apparatus and the carriage 2 is stored in the stocker 52. It is provided to be performed. Therefore, the carriage 2 moves to the stocker 5
2, the motor 8 rotates the cam member 7 to move the change plate 87 to the upper right in FIG. Then, the shaft 79 is pushed by the fork portion 91 at the end of the change plate 87 and moves so as to protrude from the right side chassis 20, and the switching gear 17 is separated from the shuttle driving gear 18 while the bush 78 and the gear 77 Are engaged with the lock-up pins 80 and 81 respectively to be integrated. As a result, the power of the motor 5 is controlled by the belt 14, the pulley 15, the tray driving gear 16, the switching gear 17, the shaft 79, the bush 78, the gear 77, the gears 76, 75, and 7.
4. A gear train transmitted to the stocker gear 71 is configured.
Therefore, when the motor 5 is rotated in an arbitrary direction based on the control command, the stocker support plate 69R moves forward or backward by an arbitrary amount in an arbitrary direction. At this time, the forward and backward movement of the stocker support plate 69R is also transmitted to the left stocker support plate 69L via the stocker arm 72 that rotates about the shaft 130, and moves the left stocker support plate 69L by the same amount. As a result, the left and right stocker support plates 69R and 69L move in the opposite directions by the same amount to move the stocker 52 up and down.

[0036] Here, the height detection of the stocker 5 2, i.e. the detection of the selected disk carriage Sutokkagiya 7
The carriages No. 0 to No. 6 can be selected by a stocker position detecting means constituted by a transmission type sensor 139 disposed opposite to the slit 105 provided on the main chassis 19. For example, the number of the disk or the carriage from the home position or the current position can be displayed.

Next, when playing a disc, a stocker 5 2 is vertical movement in the above-described stocker position detecting means so that the selected disk is out playing position. After the stocker 52 is raised or lowered to a predetermined position, the cam member 7
Rotates the change arm 88 to move the change plate 87 to the left. by this,
Carriage lever 86 engaged with change plate 87
Is pushed to the back side, and the wedge-shaped projection 8 of the carriage lifter 84 is
, Two wedge-shaped projections 5 of the carriages 2,.
9 and raise the carriage above the carriage on which the selected disc is placed. On the other hand, the shaft 79 moves to the left by moving the change plate 87 to the left, the switching gear 17 and the shuttle driving gear 18 mesh with each other, and the bush 78 and the gear 77 move.
And the rotation transmission to the stocker gear 71 side is cut off. At this time, the change plate 8 that moves to the left
7 is inserted into a groove 104 formed on the lower surface of the stocker gear 71 to prevent the stocker gear 71 from moving back and forth. Then, when the motor 5 is driven, the shuttle 11 meshing with the shuttle driving gear 18 is moved to the tray 1.
It is paid out toward 0. At this time, since the arm 60 of the shuttle 11 is engaged with the concave portion 57 of the carriage 2, the carriage 2 is moved into the drawer tray 10. When the light from the optical sensor 21 hits the disk surface through the disk detection hole 67 of the carriage 2 and detects reflected light during the pull-out operation of the carriage 2,
When the carriage 2 is stopped, the selected disk 3 can be set at the playing position. Next, the rotation of the cam member 7 raises the pickup unit 6 so as to swing around the two support shafts 111 and 112 in the elongated holes 113 and 114 of the bracket, and places the disk 3 on the turntable 110. And a clamper 117 rotatably inserted into the clamper chassis 116.
Then perform.

The above embodiment is a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the spirit of the present invention. For example, in this embodiment, a case where the present invention is mainly applied to a disc changer having a built-in stocker in which a plurality of discs are stored in advance has been described. However, the present invention is not particularly limited to this, and one disc is taken in and out of a tray. It is also possible to use it for a normal disc reproducing device which is exchanged.

[0039]

As is apparent from the above description, according to the pickup unit supporting structure of the present invention, the pickup unit is provided at one end away from the turntable.
The turntables are placed vertically one above the other, almost in the axial direction.
Two support shafts provided with, the support member to form a sloped elongated hole vertically elongated hole and a lower support shaft above the support shaft is fitted to the fitting, the pickup unit is substantially at a raised position near Since the horizontal ascent operation is performed, the disk can be held by tilting the entire pickup unit downward from the movement trajectory of the tray and returning the inclination to a horizontal position with a slight vertical movement amount. Therefore, according to the present invention, the disk reproducing apparatus can be made compact without being bulky in the vertical direction.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a switching mechanism of a disc changer.

FIG. 2 is an exploded perspective view of a bush, a gear, and a shaft that constitute a switching mechanism.

FIG. 3 is a perspective view showing an embodiment of a stocker unit.

FIG. 4 is an exploded perspective view of the stocker.

FIG. 5 is a rear view of the cam member.

FIG. 6 is a plan view of the stocker gear.

FIG. 7 is a perspective view of a drive system of a transport unit.

FIG. 8 is an exploded perspective view of a drive system of the transport unit of FIG.

FIG. 9 is a perspective view showing an example of a pickup unit support structure of the present invention, showing a pickup unit and a tray.

10A and 10B are side views showing an operation state of the pickup unit supporting structure of the present invention, wherein FIG. 10A shows a retracted state, FIG. 10B shows a state where the pickup is being lifted, and FIG. 10C shows a pickup set state.

FIG. 11 is a view showing a cam gear, (A) is a plan view,
(B) is a side view showing a cam for driving the pickup unit.

FIG. 12 is an exploded perspective view of the pickup unit of the present invention.

FIG. 13 is a perspective view showing a state before mounting the clamper and the clamper chassis.

FIG. 14 is a perspective view showing a clamper and a clamper chassis after being mounted.

FIG. 15 is a front view showing a state where the clamper and the clamper chassis are mounted.

FIG. 16 is a plan view showing a state where a clamper and a clamper chassis are mounted.

FIG. 17 is a perspective view showing a relationship between a stocker, a disc lock pin, and a disc stopper pin.

FIGS. 18A and 18B are explanatory diagrams showing an operation state of a disk lock pin when a disk is correctly accommodated on a carriage, wherein FIG. 18A shows a state in which the carriage is stored, and FIG. 18B shows a state in which the disk is locked by the disk lock pin. .

FIGS. 19A and 19B are explanatory diagrams showing an operation state of a disk lock pin when the disk is accommodated with being shifted on the carriage, wherein FIG. 19A shows a state in which the carriage is stored, and FIG. Show.

FIG. 20 is a perspective view of a tray.

FIG. 21 is an exploded perspective view of the tray.

FIG. 22 is an assembled perspective view showing a state where members constituting a stocker elevating mechanism such as a stocker support plate and a stocker arm are attached to the main chassis.

23 is an assembly perspective view showing a state where a cam member, a disc lock pin, and the like are further assembled to the state shown in FIG. 22;

24 is an assembly perspective view showing a state in which a drive system of the transport means is further assembled to the state shown in FIG. 23;

FIG. 25 is an assembly perspective view showing a state where a stocker and a top plate are further assembled to the state of FIG. 24;

26 is an assembly perspective view showing a state where a tray and a clamper chassis are further assembled to the state shown in FIG. 25;

FIG. 27 is a perspective view showing a disc changer that has been assembled.

FIG. 28 is an explanatory view showing a schematic mechanism of a conventional disc changer.

[Explanation of symbols]

 Reference Signs List 3 Disc 6 Pickup unit 7 Cam member 8 Motor 102 Cam surface that gives displacement to arm 106 Pickup that constitutes pickup unit 107 Arm that constitutes pickup unit 108 Bracket as support member 110 Turntable 111, 112 Support shaft 113 Vertical long hole 114 Inclined Slot

Continuation of the front page (72) Inventor Kenichiro Aoki 2-17-3 Kaga, Itabashi-ku, Tokyo Tokyo Pigeon Corporation (72) Inventor Masao Kamijo 2-17-3 Kaga, Itabashi-ku Tokyo Tokyo Pigeon Corporation (72) Inventor Kiyoshi Nawada 2-17-3 Kaga, Itabashi-ku, Tokyo Inside Pigeon Co., Ltd. (56) References JP-A-4-90164 (JP, A) (58) Fields investigated (Int. Cl. ^6, DB name) G11B 17/22 - 17/30 G11B 25/04 G11B 17/04

Claims (1)

(57) [Claims] 1. A pickup unit support structure comprising: a pickup unit including a turntable on which a disc is mounted and rotated, and a pickup for reading information on the disc; and a support member that supports the pickup unit movably up and down. In the pickup unit, one of the ones away from the turntable
At the end, almost vertically in the axial direction of the turntable, up and down
The two support shafts arranged are formed, and the support member is formed with a vertical long hole in which an upper support shaft is fitted and an inclined long hole in which a lower support shaft is fitted. A pickup unit supporting structure characterized in that the pickup unit is moved almost horizontally near the ascending position.